How to save a Linux virtual machine by forgetting the root password

So Baidu, there are a lot of solutions. The principle is that to enter single user mode, to change the root password:

1. Reboot the system, select Linux boot, then press and hold E to display the following interface;

Press E to show the following page

Choose kernel ...

? 2. At the press of E, the following interface appears:

3.??? Enter Single:

? 4. Press ENTER to enter;

5. Press B to restart:

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? 6. Enter the root password:

?

? 7. If. I mean, what if ...? If you enter passwd root, the bottom does not let you enter new password .... So... You enter the root password directly: passwd root [email protected]

8.ok, restart reboot ...?

How to save a Linux virtual machine by forgetting the root password